TM9-2320-363-20-1
Table 3-1.
Troubleshooting
(Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Engine Brake Retard Circuits
1.
ENGINE
BRAKE
RETARD
(JAKE
BRAKE)
OPERATING
NORMALLY.
Step
1.
Check
engine brake 15A
l
Step 2.
Disconnect
switch end
l
If defective,
NOT OPERATING,
TRANSMISSION
fuse.
replace
15A fuse
(page
4-204).
LOCKUP
lead 121 B from two-cylinder
brake
switch. Check
for +12
VDC at
of lead 121B.
If +12 VDC
is present,
repair
lead 121B
at switch connector
(page 3-2).
If no voltage
is present,
repair lead
121B at
connector 87 on engine
brake
lockout relay (page
3-2).
3-25
